JP4362162B2 - Press working method - Google Patents

Description

こうして、一のプレス装置３０を作動させれば、そのプレス装置３０内の第１〜５成形型３１〜３５で第１〜４プレス品３〜６に応じた複数種類のプレス加工を施すことができる。また、１台のプレス装置３０が特定種類のプレス品に必要なプレス加工のみを行うわけではない。このため、プレス装置の数が第５〜８プレス品７〜１０の種類の４より少ない１である。このため、設備費用の低廉化を実現している。
【００３１】
また、プレス装置３０内の一部の成形型のみを取り替えれば足り、常にすべての第１〜５成形型３１〜３５を同時に取り替える必要がないことから、取り替え回数が減少し、かつ取り替えコストも低くなる。このため、運転費用の低廉化を実現している。
また、プレス装置３０内の第１〜５成形型３１〜３５の変更、配置の変更又は搬送ルートの変更を行えば、他の複数種類のプレス品も得られ、汎用性に富むことから、将来の設備費用も低廉化可能である。
【００３２】
さらに、第１〜５成形型３１〜３５をもつプレス装置３０自体は稼動率が高い。このため、同数生産を行う作業を短時間で終えることができ、運転費用の低廉化を実現している。
また、こうして４種類の第５〜８プレス品７〜１０を大量に製造する場合、ＮＣロールフィーダからの選択的な信号により、種類毎に同数のプレス品を製造するようにプレス加工を行うことができることから、設計変更時にも特定種類のプレス品が残品となる蓋然性がない。
【００３３】
こうして得られた第５〜８プレス品７〜１０は、図１に示すように、図示しない搬送装置により組付け・溶接工程Ｓ４に送られる。これら第５〜８プレス品７〜１０は、図１３に示す作業テーブル１１上において、図１２に示すように、各フランジ部７１、８１、９１、１０１の両端がそれぞれのセギリ部７１ａ、８１ａ、９１ａ、１０１ａで互いに重ね合わされ、位置決め孔３ｂ、６ａが互いに重なり合いつつ互いに共通し、位置決め孔３ａ、４ｂ、位置決め孔４ａ、５ｂ、位置決め孔５ａ、６ｂ及び位置決め孔６ａ、３ｂが互いに重なり合いつつ互いに共通とされる。
【００３４】
この際、作業テーブル１１上には 図１３に示すように、直交する放射方向にそれぞれ３列のピン１２ａ〜１２ｃ、１３ａ〜１３ｃ、１４ａ〜１４ｃ、１５ａ〜１５ｃが高さ方向に突設されているため、フレームＦは、第５〜８プレス品７〜１０の位置決め孔３ａ、４ｂ、４ａ、５ｂ、５ａ、６ｂ、６ａ、３ｂに各ピン１２ａ〜１２ｃ、１３ａ〜１３ｃ、１４ａ〜１４ｃ、１５ａ〜１５ｃのいづれかの組み合わせを挿入して組みつけられる。このとき、第５〜８プレス品７〜１０の長さの相違により、平面視で相似形をなす３種類のフレームＦ１〜Ｆ３のいづれかとして組みつけられる。
【００３５】
作業テーブル１１は、チェーン１６、１７により、図１４に示すように、溶接ラインに沿って水平移動及び回転可能とされている。このため、フレームＦを載置した作業テーブルは、まず鉛直方向から溶接可能な一対のスポットガン１８、１８により各フランジ部７１、８１、９１、１０１が互いに溶接され、この後水平方向から溶接可能な一対のスポットガン１９、１９により各側壁部７２、８２、９２、１０２が互いに溶接される。こうして、少ない方向から複数箇所の溶接を行うことができ、設備費用のより低廉化を実現している。そして、作業テーブル１１が鉛直方向に位置し、図示しないロボット等のハンドによりフレームＦが搬出される。
【００３６】
したがって、実施形態のプレス加工方法では、設備費用及び運転費用の低廉化を実現可能であるとともに、特定種類のプレス品だけが残品とならず、最終的には、製品コストの低廉化を実現できるとともに、資源の有効活用も図ることができる。
【図面の簡単な説明】
【図１】実施形態に係り、換気扇のフレームの製造方法を示す流れ図である。
【図２】実施形態に係り、ブランク加工を行なうプレス装置の模式側面図である。
【図３】実施形態に係り、第１種類のプレス品のブランクを示す平面図である。
【図４】実施形態に係り、第２種類のプレス品のブランクを示す平面図である。
【図５】実施形態に係り、第３種類のプレス品のブランクを示す平面図である。
【図６】実施形態に係り、第４種類のプレス品のブランクを示す平面図である。
【図７】実施形態に係り、曲げ加工を行なうプレス装置の模式側面図である。
【図８】実施形態に係り、第１種類のプレス品を示す斜視図である。
【図９】実施形態に係り、第２種類のプレス品を示す斜視図である。
【図１０】実施形態に係り、第３種類のプレス品を示す斜視図である。
【図１１】実施形態に係り、第４種類のプレス品を示す斜視図である。
【図１２】実施形態に係り、換気扇のフレームを示す斜視図である。
【図１３】実施形態に係り、組付け工程及び溶接工程を行なうテーブル等の平面図である。
【図１４】実施形態に係り、組付け工程及び溶接工程を行なうラインの縮小模式平面図である。
【符号の説明】
１…ワーク（帯板）
３〜１０…プレス品（３…第１プレス品、４…第２プレス品、５…第３プレス品、６…第４プレス品、７…第５プレス品、８…第６プレス品、９…第７プレス品、１０…第８プレス品）
２１…共通プレス加工用プレス装置（サブプレス装置）
２２…非共通プレス加工用プレス装置（メインプレス装置）
３０…プレス装置
３１〜３５…成形型（３１…第１成形型、３２…第２成形型、３３…第３成形型、３４…第４成形型、３５…第５成形型）
Ｆ、Ｆ１〜Ｆ３…枠（フレーム）
Ｆａ…フランジ
７１、８１、９１、１０１…フランジ部
Ｆｂ…側壁
７２、８２、９２、１０２…側壁部
３ａ、３ｂ、４ａ、４ｂ、５ａ、５ｂ、６ａ、６ｂ…位置決め孔
１２ａ〜１２ｃ、１３ａ〜１３ｃ、１４ａ〜１４ｃ、１５ａ〜１５ｃ…ピン
１１…作業テーブル[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a pressing method.
[0002]
[Prior art]
In a general press processing method, when a plurality of types of press products are obtained from a workpiece, the workpiece is subjected to a plurality of types of press processing according to each press product. In this case, since each type of press work is different, it is generally performed by a separate press device. That is, the molding dies necessary for each press work are assembled in separate press devices, and each press work is performed by the operation of each press device. Each press product of each kind obtained in this way is made into a product through mutual assembly, welding and the like.
[0003]
For example, when it is desired to manufacture a large amount of a metal frame such as a frame of a ventilation fan having a regular square shape in plan view, it is necessary to obtain a large amount of four types of press products constituting the sides of the frame by pressing. In this case, such a press product is obtained by subjecting the workpiece to press processing including a plurality of types of blanking and bending. More specifically, when the frame is a frame of a ventilation fan, each press product is bent and extended from one end of the flange portion and a flange portion of the frame, and the side wall of the frame. because it has a plate-like side wall portion constituting the, such pressed product is usually constant One not a long conveying a metal strip wound into a roll by the NC roll feeder or the like, The strips that are transported sequentially are subjected to a blanking process consisting of a punching process and a punching process, and a pressing process consisting of a bending process consisting of a cutting process, an end face processing process, a width processing process, a combing process, and a flanging process. Will be obtained. Since each process has a different type, the mold necessary for each process is assembled in a separate press apparatus, and each process is performed by the operation of each press apparatus. Then, the four pressed products for each type are assembled to each other and then welded to form a ventilation fan frame.
[0004]
[Problems to be solved by the invention]
However, in the above general press processing method, since a plurality of types of press processing are performed according to each press product, when one type of press product is obtained, a plurality of press processing is performed, and the other one type of press product is used. In order to obtain it, it is necessary to perform a plurality of press work again. For this reason, the number of press apparatuses provided for each press work increases, resulting in an increase in equipment costs.
[0005]
In this regard, if a single press can be used to perform multiple press operations required for one type of press product, it is sufficient to prepare as many press devices as the number of types of press products. It is thought that the equipment cost can be reduced and the equipment cost can be reduced. However, even in this case, the number of press devices is the same as the number of types of press products, and it is not yet sufficient to reduce the equipment cost. In addition, in a press machine that can perform multiple press processes in this way, when it is desired to replace the mold due to partial wear or the like, the entire mold must be replaced, the number of replacements is large, and the replacement cost is high. However, this increases the operating cost. Furthermore, this press apparatus has a high degree of speciality for that type of press product, lacks versatility when manufacturing other types of press products, and raises concerns about future equipment costs.
[0006]
Whether a press machine that performs only one press process or a press apparatus that performs multiple press processes is prepared, the operating rate of the press apparatus cannot be high, and it is long for the same number of operations. It will take time and increase operating costs .
[0007]
Thus, in the above general press-forming method, in the end, it intends want to lead to soaring of the product cost.
The present invention was made in view of the above conventional circumstances, and an object to be achieved by providing the possibility der pulp-less working method realizing cost reduction of the equipment cost and operating cost.
[0008]
[Means for Solving the Problems]
The press working method of the first invention is a press working method for obtaining a plurality of types of press products by performing a plurality of types of press processing on the workpiece.
Each press product is welded together to form a metal frame having a polygonal shape in plan view. Each press product is composed of a plate-like flange portion that constitutes a flange of the frame and one end of the flange portion. It has a plate-like side wall portion that refracts and extends and constitutes the side wall of the frame,
The flange portion is provided with positioning holes that overlap each other and are common to each other,
There noncanonical pressing the line is divided into not common to the common pressing each said pressed product common each said pressing each said pressed product,
The step of drilling the positioning holes for each of the press products is performed by a single press device as the common press processing,
The remaining process is performed as the non-common press working .
[0009]
In the press working method of the first invention, it is sufficient to prepare a single press device for common press work and a press device for non-common press work as a press device used for press work. For this reason, the number of press devices is reduced, and the equipment cost can be reduced.
The press working method of the second invention is a press working method for obtaining a plurality of types of press products by applying a plurality of types of press processing to the workpiece.
Each press product is welded together to form a metal frame having a polygonal shape in plan view. Each press product is composed of a plate-like flange portion that constitutes a flange of the frame and one end of the flange portion. It has a plate-like side wall portion that bends and extends and constitutes the side wall of the frame,
A plurality of molds are provided in the same press apparatus, and each press work is performed by operating the press apparatus while conveying the workpiece to each mold according to the desired press product. And
[0010]
In the press working method of the second invention, if one press device is operated, a plurality of types of press work corresponding to each press product can be performed with a plurality of molds in the press device. As a result, the number of press devices to be used is reduced, and the equipment cost can be reduced.
Further, in the press working method of the second invention, since one press device does not perform only the press work necessary for a specific type of press product, the number of press devices may be made smaller than the number of press product types. It is possible to reduce the equipment cost.
[0011]
Furthermore, in the press working method of the first invention, the common press work that is likely to cause wear or the like in the mold due to a large number of presses and the non-common press work that is less likely to cause wear or the like due to a small number of presses are separated. since it is, it can be replaced Ri taken separately and mold for molding and non-common pressing for a common pressing, always it is not necessary to replace the same time both the number replacement is reduced, and replacement Since the cost is also low, the operation cost can be reduced. Similarly, in the press working method of the second invention, it is sufficient to replace only a part of the molds in the press apparatus, and it is not always necessary to replace all the molds at the same time. Since the cost is also low, the operation cost can be reduced.
[0012]
Further , in the press working method of the second invention, if a change of the mold in the press device, a change of the arrangement or a change of the transport route, other plural types of press products can be obtained, which is highly versatile. Future equipment costs can also be reduced.
[0013]
Furthermore, in the press processing method of the first invention, the press device for common press processing and the press device for non-common press processing are operated only by common / non-common press processing. Get higher. Similarly, in the press working method according to the second aspect of the invention, the operating rate of the press device itself having a plurality of forming dies is increased. For this reason, the operation | work which performs the same number production can be completed in a short time, and reduction of an operating cost is realizable.
[0014]
Furthermore, when a plurality of types of press products are manufactured in large quantities by the press processing method of the second invention, the press processing can be performed so as to manufacture the same number of press products for each type. It is possible to eliminate the probability that a press product becomes a remaining product.
Therefore, according to the press-forming method of the first and second invention, Ri can der realize cost reduction of equipment costs and operating costs, in the end-form, can be realized cost reduction of product cost.
[0015]
Press-forming method of the first and second invention is embodied in each of the following press article. That is, when each pressed product is welded together to form a metal frame having a polygonal shape in plan view, each pressed product has a plate-like flange portion that constitutes the flange of the frame, and the flange portion. It is a case where it has a plate-shaped side wall part which bends and extends from one end and constitutes the side wall of the frame. Such a frame corresponds to a frame of a ventilation fan or the like.
[0016]
In the case of such a pressed product, it is preferable that the flange portion is provided with a common positioning hole while overlapping each other. If it is like this, it will be easy to assemble | attach before pressing each press goods for every kind mutually. At this time, while inserting the pins projecting in the height direction of the frame into the positioning holes or inserting the positioning holes into the pins, the flange portions are welded to each other and the side wall portions are connected to each other. Can be welded.
[0017]
Each pin is conveniently provided on a work table. In the case of manufacturing various types of frames having similar shapes in plan view, it is preferable that the pins protrude in the radial direction on the work table. In this way, it is possible to position multiple types of similar frames on the same work table.
The work table is preferably horizontally movable and rotatable. In this way, it is possible to perform welding at a plurality of locations from a small number of directions, and it is possible to realize a further reduction in equipment costs.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments embodying the first and second inventions will be described with reference to the drawings.
In the embodiment, as shown in FIG. 12, a frame F of a ventilation fan having a regular square shape in plan view is manufactured.
First, as shown in FIG. 1, it transported One not a necessary length by NC roll feeder (not shown) the metal strip 1 as a work that has been rolled, and sends the blanking step S2. In order to manufacture the frame F of the ventilation fan, in this blank processing step S2, the first press product 3 shown in FIG. 3, the second press product 4 shown in FIG. 4, the third press product 5 shown in FIG. The fourth press product 6 shown in FIG.
[0019]
In the blank processing step S <b> 2, as shown in FIG. 2, a sub press device 21 is provided on the upstream side, and a main press device 22 is provided on the downstream side of the sub press device 21. The sub-press device 21 is operated by a selective signal from the NC roll feeder, and as a common press process common to the press products 3 to 6, positioning holes 3a positioned at both ends of the first press product 3 shown in FIG. 3b, positioning holes 4a and 4b positioned at both ends of the second press product 4 shown in FIG. 4, positioning holes 5a and 5b positioned at both ends of the third press product 5 shown in FIG. 5, and the first shown in FIG. A drilling process is performed with the positioning holes 6a and 6b located at both ends of the four-press product 6. The main press device 22 is also operated by a selective signal from the NC roll feeder, which includes non-common press processing not common to the respective press products 3 to 6, and the outer shape of the first press product 3 shown in FIG. The outer shape of the second press product 4 shown in FIG. 4 and the shutter holes 4c, 4d, and 4f aligned in the longitudinal direction, the outer shape of the third press product 5 shown in FIG. 5, and the outer shape of the fourth press product 6 shown in FIG. In addition, a punching process and a punching process with the shutter holes 6c, 6d, and 6f aligned in the longitudinal direction are performed.
[0020]
Thus, the four types of first to fourth press products 3 to 6 shown in FIGS. 3 to 6 are obtained by the sub press device 21 for common press processing and the main press device 22 for non-common press processing.
At this time, the sub-press device 21 and the main press device 22 do not perform only the press work necessary for a specific type of press product. For this reason, the number of press devices is 2, which is less than 4 of the types of the first to fourth press products 3-6. For this reason, the equipment cost is reduced.
[0021]
Further, the sub-press device 21 that has a large number of presses and is likely to cause wear and the like is separated from the main press device 22 that has a small number of presses and does not easily cause wear and the like. Since the molding die and the molding die of the main press device 22 can be replaced separately, and it is not always necessary to replace them at the same time, the number of replacements is reduced and the replacement cost is reduced. For this reason, the equipment cost is reduced.
[0022]
Further, if any one of the sub-press device 21 and the main press device 22 is changed, other plural types of press products can be obtained, and the versatility is high, so that the future equipment cost can be reduced.
Furthermore, since both the sub-press device 21 and the main press device 22 are operated only by common / non-common press work by a selective signal from the NC roll feeder, the operation rate is high. For this reason, the operation | work which performs the same number production can be completed in a short time, and the reduction of an operating cost is implement | achieved.
[0023]
In addition, when four types of first to fourth press products 3 to 6 are manufactured in large quantities in this way, press processing is performed so that the same number of press products are manufactured for each type by a selective signal from the NC roll feeder. Therefore, even when the design is changed, there is no probability that a certain type of pressed product will be left over.
Next, as shown in FIG. 1, the first to fourth press products 3 to 6 as workpieces are sent to the bending step S <b> 3 by a conveying device (not shown). As shown in FIG. 7, in the press apparatus 30 which performs this bending process S3, the 1st shaping | molding die 31 which performs a last process and an end surface processing process with respect to the 1st-4th press products 3-6, 90 degrees A second molding die 32 that performs the step of removing the stripe, a third mold 33 that performs the step of removing the 60 ° phase, a fourth mold 34 that performs the step of extending the width of 30 ° 2 mm for the purpose of reinforcement, and a step of extending the flange. A fifth mold 35 to be performed is provided.
[0024]
Then, the press device 30 is operated while conveying the first to fourth press products 3 to 6 to the first to fifth molding dies 31 to 35 by a selective signal from the NC roll feeder, and the first press product shown in FIG. 3 to FIG. 8, a fifth press product 7 shown in FIG. 4, a second press product 4 shown in FIG. 4 to a sixth press product 8 shown in FIG. 9, and a third press product 5 to FIG. 10 shown in FIG. The press product 9 and the fourth press product 6 shown in FIG. 6 to the eighth press product 10 shown in FIG. 11 are obtained.
[0025]
Thus, as shown in FIG. 8, the fifth press product 7 is bent and extended from one end of the flange portion 71 and a plate-like flange portion 71 constituting one side of the flange Fa of the frame F shown in FIG. And a plate-like side wall portion 72 forming one side of the side wall Fb of the frame F is formed. The flange portion 71 is molded by performing a flange unloading process on the side wall portion 72 by the fifth molding die 35. The flange portion 71 is formed with a margin portion 71 a that has been subjected to a margin step and an end surface treatment step by the first mold 31. The side wall 72 is formed with a 90 ° eclipse 72a subjected to the 90 ° elongating step by the second mold 32 and a 60 ° eclipse 72b subjected to the 60 ° elongating step by the third forming die 33. .
[0026]
As shown in FIG. 9, the sixth press product 8 is bent and extends from a plate-like flange portion 81 constituting one side of the flange Fa of the frame F shown in FIG. 12 and one end of the flange portion 81. A plate-like side wall portion 82 forming one side of the side wall Fb of the frame F is formed. As with the fifth press product 7, the flange portion 81 is formed by performing a flange unloading process on the side wall portion 82 with the fifth forming die 35. The flange portion 81 is formed with a margin portion 81 a that has been subjected to a margin step and an end surface treatment step by the first mold 31. The side wall portion 82 is formed with a 90 ° elongate step 82a subjected to a 90 ° elongating step by the second mold 32 and a width portion 82b subjected to a 30 ° 2 mm elongating step by the fourth forming die 34. .
[0027]
As shown in FIG. 10, the seventh press product 9 is bent and extends from a plate-like flange portion 91 constituting one side of the flange Fa of the frame F shown in FIG. 12 and one end of the flange portion 91. A plate-like side wall portion 92 forming one side of the side wall Fb of the frame F is formed. Like the fifth and sixth press products 7 and 8, the flange portion 91 is formed by performing a flange unloading process with respect to the side wall portion 92 by the fifth forming die 35. A flange portion 91 is formed with a margin portion 91 a that has been subjected to a margin step and an end surface treatment step by the first mold 31. The side wall 92 is formed with a 90 ° eclipse 92a that has been subjected to a 90 ° ebbing process by the second mold 32 and a 60 ° eclipse 92b that has been subjected to a 60 ° elongating process by the third mold 33. .
[0028]
As shown in FIG. 11, the eighth press product 10 is bent and extends from a plate-like flange portion 101 constituting one side of the flange Fa of the frame F shown in FIG. 12 and one end of the flange portion 101. A plate-like side wall 102 constituting one side of the side wall Fb of the frame F is formed. As with the fifth to seventh press products 7 to 9, the flange portion 101 is formed by performing a flange unloading process on the side wall portion 102 with the fifth forming die 35. A flange portion 101 is formed with a margin portion 101 a that has been subjected to a margin step and an end surface treatment step by the first mold 31. The side wall 102 is formed with a 90 ° elongate step 102a subjected to the 90 ° elongating step by the second mold 32 and a width portion 102b subjected to the 30 ° 2 mm elongating step by the fourth forming die 34. .
[0029]
At this time, the selection of the first to fifth molding dies 31 to 35 in 10 strokes of the press device 30 is as in the example shown in Table 1 below.
[0030]
[Table 1]

Thus, when one press device 30 is operated, a plurality of types of press work according to the first to fourth press products 3 to 6 can be performed by the first to fifth molding dies 31 to 35 in the press device 30. it can. In addition, one press device 30 does not perform only the press work necessary for a specific type of press product. For this reason, the number of press apparatuses is 1 less than 4 of the kind of 5th-8th press goods 7-10. For this reason, the equipment cost is reduced.
[0031]
In addition, only a part of the molds in the press device 30 need to be replaced, and it is not always necessary to replace all the first to fifth molds 31 to 35 at the same time. Lower. For this reason, the operation cost is reduced.
In addition, if the first to fifth molding dies 31 to 35 in the press device 30 are changed, the arrangement is changed, or the conveyance route is changed, other types of press products can be obtained, which is highly versatile. The equipment cost can be reduced.
[0032]
Further, the press device 30 itself having the first to fifth molds 31 to 35 has a high operating rate. For this reason, the operation | work which performs the same number production can be completed in a short time, and the reduction of an operating cost is implement | achieved.
In addition, when four types of fifth to eighth press products 7 to 10 are manufactured in large quantities in this way, press processing is performed so as to manufacture the same number of press products for each type by a selective signal from the NC roll feeder. Therefore, even when the design is changed, there is no probability that a certain type of pressed product will be left over.
[0033]
As shown in FIG. 1, the fifth to eighth press products 7 to 10 thus obtained are sent to the assembly / welding step S <b> 4 by a conveying device (not shown). These 5th to 8th press products 7 to 10, on the work table 11 shown in FIG. 13, as shown in FIG. 12, both ends of the flange parts 71, 81, 91, 101 are respectively the serrated parts 71 a, 81 a, 91a and 101a are overlapped with each other, and the positioning holes 3b and 6a overlap each other and are common to each other, and the positioning holes 3a and 4b, the positioning holes 4a and 5b, the positioning holes 5a and 6b and the positioning holes 6a and 3b overlap each other and are common to each other It is said.
[0034]
At this time, as shown in FIG. 13, three rows of pins 12 a to 12 c, 13 a to 13 c, 14 a to 14 c, and 15 a to 15 c are projected on the work table 11 in the height direction. Therefore, the frame F has pins 12a to 12c, 13a to 13c, 14a to 14c, and 15a in the positioning holes 3a, 4b, 4a, 5b, 5a, 6b, 6a, and 3b of the fifth to eighth press products 7 to 10. It can be assembled by inserting any combination of ~ 15c. At this time, depending on the difference in the lengths of the fifth to eighth press products 7 to 10, they are assembled as any of the three types of frames F <b> 1 to F <b> 3 that are similar in plan view.
[0035]
As shown in FIG. 14, the work table 11 can be horizontally moved and rotated along the welding line by the chains 16 and 17. For this reason, the work table on which the frame F is placed is first welded to the flange portions 71, 81, 91, 101 by a pair of spot guns 18, 18 that can be welded from the vertical direction, and can be welded from the horizontal direction thereafter. The side wall portions 72, 82, 92, 102 are welded to each other by a pair of spot guns 19, 19. In this way, a plurality of locations can be welded from a small number of directions, and the equipment cost can be further reduced. Then, the work table 11 is positioned in the vertical direction, and the frame F is carried out by a hand such as a robot (not shown).
[0036]
Therefore, in the press working method of the embodiment, it is possible to realize a reduction in equipment cost and operation cost, and not only a specific type of press product remains, but ultimately a reduction in product cost is realized. In addition, the resources can be used effectively.
[Brief description of the drawings]
FIG. 1 is a flowchart illustrating a method of manufacturing a frame of a ventilation fan according to an embodiment.
FIG. 2 is a schematic side view of a press device that performs blanking according to the embodiment.
FIG. 3 is a plan view showing a blank of a first type of press product according to the embodiment.
FIG. 4 is a plan view showing a blank of a second type of press product according to the embodiment.
FIG. 5 is a plan view showing a blank of a third type of press product according to the embodiment.
FIG. 6 is a plan view showing a blank of a fourth type of pressed product according to the embodiment.
FIG. 7 is a schematic side view of a press device that performs bending according to the embodiment.
FIG. 8 is a perspective view showing a first type of pressed product according to the embodiment.
FIG. 9 is a perspective view showing a second type of pressed product according to the embodiment.
FIG. 10 is a perspective view showing a third type of pressed product according to the embodiment.
FIG. 11 is a perspective view showing a fourth type of pressed product according to the embodiment.
FIG. 12 is a perspective view showing a frame of a ventilation fan according to the embodiment.
FIG. 13 is a plan view of a table and the like for performing an assembly process and a welding process according to the embodiment.
FIG. 14 is a reduced schematic plan view of a line for performing an assembly process and a welding process according to the embodiment.
[Explanation of symbols]
1 ... Work (band)
3 to 10: Pressed product (3: First pressed product, 4: Second pressed product, 5: Third pressed product, 6: Fourth pressed product, 7: Fifth pressed product, 8: Sixth pressed product, 9 (7th press product, 10 ... 8th press product)
21 ... Common press working press machine (sub-press machine)
22 ... Non-common press working press machine (main press machine)
30 ... Press devices 31-35 ... Mold (31 ... First mold, 32 ... Second mold, 33 ... Third mold, 34 ... Fourth mold, 35 ... Fifth mold)
F, F1 to F3 ... Frame
Fa ... Flange 71, 81, 91, 101 ... Flange part Fb ... Side wall 72, 82, 92, 102 ... Side wall part 3a, 3b, 4a, 4b, 5a, 5b, 6a, 6b ... Positioning holes 12a-12c, 13a- 13c, 14a-14c, 15a-15c ... pin 11 ... work table

Claims (6)

In the press processing method to obtain multiple types of press products by applying multiple types of press work to the workpiece,
Each press product is welded together to form a metal frame having a polygonal shape in plan view. Each press product is composed of a plate-like flange portion that constitutes a flange of the frame and one end of the flange portion. It has a plate-like side wall portion that refracts and extends and constitutes the side wall of the frame,
The flange portion is provided with positioning holes that overlap each other and are common to each other,
There noncanonical pressing the line is divided into not common to the common pressing each said pressed product common each said pressing each said pressed product,
The step of drilling the positioning holes for each of the press products is performed by a single press device as the common press processing,
A press working method comprising performing the remaining steps as the non-common press work . In the press processing method to obtain multiple types of press products by applying multiple types of press work to the workpiece,
Each press product is welded together to form a metal frame having a polygonal shape in plan view. Each press product is composed of a plate-like flange portion that constitutes a flange of the frame and one end of the flange portion. It has a plate-like side wall portion that bends and extends and constitutes the side wall of the frame,
A plurality of molds are provided in the same press apparatus, and each press work is performed by operating the press apparatus while conveying the workpiece to each mold according to the desired press product. A press working method. 3. The press working method according to claim 1, wherein the flange portions are welded to each other and the side wall portions are welded to each other while inserting a pin protruding in the height direction of the frame into each positioning hole. . 4. The press working method according to claim 3, wherein each pin projects from a work table. 5. The press working method according to claim 4 , wherein when manufacturing various types of frames having a similar shape in plan view, each pin protrudes radially on the work table. 6. The press working method according to claim 5 , wherein the work table is horizontally movable and rotatable.

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